Topic: HELP + REWARD - issue to add 3 GPU to my mainboard (already 2 GPU was present) (Read 128 times)

I had a similar problem adding a 4th card. I was using windows, then tried linux...i'm going to reinstall windows and try starting fresh.

I should try one card at a time, right?

should i first install and boot windows without any gpus connected, or with 1?

and can i just install the drivers with card and then add them one by one after testing, or do i need to wait until all four are in before installing the drivers?

I am guessing that new drivers doesn't recognize old cards

don't have free 6 pin connector.
need to add one more alimentation to do that

riser was received with usb cable to link the pci slot to the card and 6 pin connector linked on the riser and output sata
see this ling they are the one i bought:

https://www.amazon.fr/dadaptateur-Amplifi%C3%A9e-dextension-dalimentation-Adaptateur/dp/B073MK1QWP/ref=sr_1_1?ie=UTF8&qid=1519200146&sr=8-1&keywords=riser+1x+16x

#
no connect riser with molex or 6pin directly

all cards are functionning because i was using them previously on my computer.
i bought a RX 570 to replace the two R9 280x and then wanted to add the two R9 280 to my mining computer
all riser are working also tested each one by one

only both card not working together (ok for the 580 1050ti detected but crash every 5 min, and R9 280x not detected at all)

he will work only with the usb cable linking the PCi and the riser?

dont power your riser with sata or molex to sata

When adding new cards especially if you mix (nvida and amd) uninstall the drivers with DDU, and then reinstall the drivers. I'd also add each card in turn so you can work out if you have a bad riser or card. Also if you can test with 1 PSU to rule that out

Working help will be tipped when i will be able to mine

Good morning,

i hope you can help me, i'm trying to add 3GPU to my mining config but i'm facing somme issue ...

my hardware:
POWER: 700 WATT BRONZE + 650 WATT
Motherboard: MSI Z77A-G45 (UP to 3 Video card)
CPU: Intel Core I3 - 3220 @ 3.30GHZ
Memory: 16GO DDR3
Video card: 2x SAPPHIRE DUAL R9 280X 3GO DDR5 OC
                 2x MSI NVIDIA GFORCE GTX 1050TI 4GO OC
                 1X MSI RADEON RX580 8GO OC
hard disk: 300 GB WD Scorpio (probably a 5400 round) 2.5"

First config i have tried:

Rx 580 on PCIE 16X (Motherboard)
2x 1050 TI on PCIE 16x (Motberboard)
2x R9 280X on PCI 1x (with riser card 1x to 16x powered by sata) => https://www.amazon.fr/dadaptateur-Amplifi%C3%A9e-dextension-dalimentation-Adaptateur/dp/B073MK1QWP/ref=sr_1_1?ie=UTF8&qid=1519200146&sr=8-1&keywords=riser+1x+16x

700Watt was powering the mainboard (24 PIN + 2x 4 PIN CPU connector) and the two R9 280x (1x8 PIN + 1x6 PIN on each card).
This one was probably also powering the two 1050TI as they take power only from the PCI-E slots

650Watt was powering the RX580 (1x 8PIN), the two 1x-16x riser (6 pin on card > Sata on PSU) and the hard disk


Result: 2 cards detected (RX580 and 1 1050TI)
Mining: RX 580 => Was OK  1050Ti: where not detected by the miner


Second config i have tried:

removed temporarly the two R9 280x.
Rx 580 on PCIE 16X (Motherboard)
1x 1050 TI on PCIE 16x (Motberboard)
1x 1050 TI on on PCI 1x (with riser card 1x to 16x powered by sata) =>
https://www.amazon.fr/dadaptateur-Amplifi%C3%A9e-dextension-dalimentation-Adaptateur/dp/B073MK1QWP/ref=sr_1_1?ie=UTF8&qid=1519200146&sr=8-1&keywords=riser+1x+16x

700Watt was powering the mainboard (24 PIN + 2x 4 PIN CPU connector)
This one was probably also powering one 1050TI as they take power only from the PCI-E slots

650Watt was powering the RX580 (1x 8PIN), one 1x-16x riser (6 pin on card > Sata on PSU) with one 1050TI and the hard disk


Result: 3 cards detected (RX580 and 1 1050TI)
Mining: RX 580 => Was OK  1050Ti: both detected BUT always error while mining and loose of hash (with one card i'm at 14MHZ on ether and with two i'm at 11.500 MHZ each)

GPU 1, CUDA error 4 - cannot write buffer for DAG
GPU 0, GpuMiner cu_kd failed 4 (0), unspecified launch failure
GPU 0, Calc DAG failed!
GPU 1 failed
Setting DAG epoch #170 for GPU1
GPU 1, CUDA error 4 - cannot write buffer for DAG
Setting DAG epoch #170 for GPU0
GPU 0 failed
GPU 0, CUDA error 4 - cannot write buffer for DAG
ETH: 02/21/18-09:15:50 - New job from eth-eu1.nanopool.org:9999
ETH - Total Speed: 0.000 Mh/s, Total Shares: 0, Rejected: 0, Time: 00:00
ETH: GPU0 0.000 Mh/s, GPU1 0.000 Mh/s
 DCR - Total Speed: 0.000 Mh/s, Total Shares: 0, Rejected: 0
 DCR: GPU0 0.000 Mh/s, GPU1 0.000 Mh/s
GPU 1 failed
GPU 0 failed
GPU0 t=19C fan=45%, GPU1 t=13C fan=45%
WATCHDOG: GPU error, you need to restart miner
Restarting OK, exit...

can you help to make everything working?
Do you think it's a power issue?
Riser are all working as i tested each separately with the 1050 TI


Thanks for reading and for help
Working help will be tipped when i will be able to mine